﻿<program
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.example.com/Program"
  xsi:type="block">
  <decl>
    <id>a</id>
    <type xsi:type="boolean"/>
  </decl>
  <decl>
    <id>b</id>
    <type xsi:type="boolean"/>
  </decl>
  <expr xsi:type="assign">
    <id>a</id>
    <rhs xsi:type="constant">
      <boolean>true</boolean>
    </rhs>
  </expr>
  <expr xsi:type="assign">
    <id>b</id>
    <rhs xsi:type="variable">
      <id>a</id>
    </rhs>
  </expr>
</program>
